Damping unit for a press
A damping unit for a press has means for applying a damping solution to a printing form and means for setting the quantity of damping solution applied. At least one sensor is provided for registering the quantity of damping solution actually applied to the printing form. By means of a comparison with a predefined quantity of damping solution, the quantity of damping solution on the printing form can be regulated.
1 . A damping unit for a press, comprising:
means for applying a damping solution to a printing form;
means for setting a quantity of damping solution applied to the printing form;
at least one sensor provided for registering the quantity of damping solution applied to the printing form and generating a sensor signal; and
a controller for controlling the setting means, the controller receiving the sensor signal, comparing the quantity with a predefined quantity of damping solution, and adjusting the setting means to regulate the quantity of damping solution applied to the printing form.
2 . A damping unit according to claim 1 , including a plurality of sensors distributed over a width of the printing form.
3 . A damping unit according to claim 1 , wherein the damping unit is a film damping unit having at least one dip roll and a damping solution distributor roll, and wherein the setting means includes means for adjusting a pressure and/or an oblique adjustment of the dip roll with respect to the damping solution distributor roll, and/or the speed of the damping solution distributor roll.
4 . A damping unit according to claim 1 , wherein the damping unit is a centrifugal damping unit having a shield adjustable for setting the quantity of damping solution applied to the printing form.
5 . A damping unit according to claim 4 , wherein the centrifugal damping unit includes at least one damping solution distributor roll and a damping solution applicator roll, and the setting means includes means for setting the adjustable shields and rotational speeds of the damping solution distributor roll and the damping solution applicator roll to regulate the quantity of damping solution applied to the printing form.
6 . A damping unit according to claim 1 , wherein the applying means includes at least one damping solution distributor roll, a damping solution applicator roll, and a spraying device for spraying the damping solution onto the damping solution distributor roll, wherein the setting means includes means for setting a spraying frequency and a spraying duration of the spraying device and rotational speeds of the damping solution distributor roll and the damping solution applicator roll to regulate the quantity of damping solution applied to the printing form.
7 . A damping unit according to claim 1 , wherein the controller is programmed to store control values for the setting means and to read back the control values for operating the setting means for a subsequent print job.